Added fragile blocks.

UltimateTimber/Plugin/resources/config.yml

@@ -483,4 +483,11 @@ required-axe:
     - 'DURABILITY:3'
     - 'DIG_SPEED:5'
   # NBT to identify the axe by.
-  nbt: 'ultimatetimber_axe'
+  nbt: 'ultimatetimber_axe'
+
+# If a tree lands on these blocks they will be destroyed.
+fragile-blocks:
+  - GLASS
+  - ICE
+  - PACKED_ICE
+  - BLUE_ICE

UltimateTimber/Plugin/src/com/songoda/ultimatetimber/manager/ConfigurationManager.java

@@ -46,7 +46,8 @@ public class ConfigurationManager extends Manager {
         HOOKS_APPLY_EXTRA_DROPS(SettingType.BOOLEAN),
         HOOKS_REQUIRE_ABILITY_ACTIVE(SettingType.BOOLEAN),
         TREE_ANIMATION_TYPE(SettingType.STRING),
-        SCATTER_TREE_BLOCKS_ON_GROUND(SettingType.BOOLEAN);
+        SCATTER_TREE_BLOCKS_ON_GROUND(SettingType.BOOLEAN),
+        FRAGILE_BLOCKS(SettingType.STRING_LIST);
 
         private SettingType settingType;
         private Object value = null;

UltimateTimber/Plugin/src/com/songoda/ultimatetimber/manager/TreeAnimationManager.java

@@ -1,5 +1,6 @@
 package com.songoda.ultimatetimber.manager;
 
+import com.songoda.core.compatibility.CompatibleMaterial;
 import com.songoda.ultimatetimber.UltimateTimber;
 import com.songoda.ultimatetimber.animation.TreeAnimation;
 import com.songoda.ultimatetimber.animation.TreeAnimationCrumble;
@@ -155,6 +156,12 @@ public class TreeAnimationManager extends Manager implements Listener, Runnable
         if (useCustomSound)
             SoundUtils.playLandingSound(treeBlock);
 
+        Block block = treeBlock.getLocation().subtract(0, 1, 0).getBlock();
+        if (ConfigurationManager.Setting.FRAGILE_BLOCKS.getStringList().contains(block.getType().toString())) {
+            block.getWorld().dropItemNaturally(block.getLocation(), CompatibleMaterial.getMaterial(block).getItem());
+            block.breakNaturally();
+        }
+
         treeDefinitionManager.dropTreeLoot(treeDefinition, treeBlock, treeAnimation.getPlayer(), treeAnimation.hasSilkTouch(), false);
         this.plugin.getSaplingManager().replantSaplingWithChance(treeDefinition, treeBlock);
         treeAnimation.getFallingTreeBlocks().remove(treeBlock);